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Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.

Key to Platanus

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1 Fruiting heads 1-2 (-3) per peduncle; bark exposed by peeling green; lobes of leaves elongate, often longer than wide; [rarely persistent or escaped cultivar]
1 Fruiting heads 1 (very per peduncle; bark exposed by peeling mostly white; Lobes of leaves broad, broader than long; [native, collectively common and widespread in our region].
  2 Major lobes of leaves usually with several secondary teeth per lobe, acuminate; lower leaf surface pubescent or glabrate with age; [widespread in our region]
  2 Major lobes of leaves usually with entire margins (rarely with 1-2 scattered secondary teeth), long-acuminate; lower leaf surface always glabrous or glabrate with age; [TX, rarely adjacent states]
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